Mercury test-gage



{No Model) W. & J. BOEKEL. MERCURY TEST GAGE.

Patented May 5, 1896.

WITNESSES top of the gage, allowing the mercury, when UNITED STATESPATENT MERCURY TEST-GAG E.

SPECIFICATION forming part of Letters Patent No.

Application filed April 29, 1893.

To all whom it may concern:

Be itknown that we, \VILLIAM BOEKEL and JULIUS BOEKEL, citizens of theUnited States, residing at Philadelphia, in the county of Philadelphiaand State of Pennsylvania, have invented certain new and usefulImprovementsin Plumbers Mercury Test-Gages; and we do declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same, reference being bad to the accompanying drawings,and to the letters of reference marked thereon, which form a part ofthis specification.

()ur invention relates to plumbers mercury test-gages, which, asheretofore constructed, have had the following objections: First, themercur Y is placed in an air-chamber at the spilled, to get into thelower parts of the gage, which are constructed of brass, therebydestroying them; second, after using the gage the 1118101113721213 to bepoured out of the airchamber into a bottle or receptacle, which maybreak or be mislaid.

The object of our invention is to overcome these objections and also toprotect the gagetube when the mercury-cup has been removed. \Ve attainthis object by means of the mechanism illustrated in the followingdrawings, in which- Figure 1 is an end elevation of the gage with aportion in section. Fig. 2 is a plan with the three-way cock insect-ion. Fig. 8 is similar view with the cock in a different positionand some of the parts omitted. Fig. at is an elevation of themercury-cup, showing it sealed up after being removed. Fig. 5 is theguard for the glass tube with the mercurycup removed. Fig. 6 is anotherview of the gage, partly in section.

a is a mercury-cup screwed into the body h of the gage, the joint beingmade air-tight by the washer a or in any ordinary manner, and the lowerportion of the mercury-cup is enlarged to form the chamber a to hold themercury cl. The inlet or mouth of the mercury-cup is larger in diameterthan the glass tube a to allow the air to pass downward into the chambera to act upon the mercury (Z to force it upward into the tube 0 toindicate the 559,367, dated May 5, 1896.

Serial No. 472,426 (No model.)

pressure. The body Z) is enlarged to allow the air which is admittedthrough the passage-way b to circulate around the tube 0. The gland g isscrewed in to the body 7) against the Washer g making an air-tight jointaround the glass tube 0. The guard g is secured to the gland g and isprovided with the opening to exposeto view the position of the inercuryas it ascends the tube (1, indicating the pressure.

71. is a two-way cock for controlling the air as it comes from the pumpthrough hose K, which is connected to the body I) by means of thecoupling 5.

m is a short section of the pipe to be tested.

The two-way cook it is located between the inlet {1 outlet b and themercury-cup a at the intersection of the passage-ways b b 5 as shown inFig. 2. .Vhen the cock 72. is turned in the position shown in Fig. 2,the air passes from the inlet Z1 through the passageways If h into thepipe m. hen turned to the position shown in Fig. 3, the air is shut offfrom the inlet and is allowed to pass from the pipe at throughpassage-ways I) Z) into the inercury-cup a to force the mercury up theglass tube 0 to indicate the pressure.

ois the ether-cup to introduce other into the pipe being tested.

When the gage is not in use, the mercuryeup is removed and sealed by thecap a as shown in Fig. 4, and can be carried in the tool-box, avoidingany loss from the pouring of the mercury into a bottle or by itsbreakage. The piece of pipe or tube 13, Fig. 5, is then screwed into thebody I) of the gage to take the place of the mercury-cup just removedand to protect the glass tube a, which is exposed by the removal of themercury-cup, thereby allowing the gage to be carried in a tool-box. Itis obvious that the mercury being in the mercury-cup below the otherparts of the gage, it is not possible for any of it to pass out of thecup to injure the parts.

The construction of our gage may be greatly varied and not depart fromthe spirit of our invention.

\Vhat we claim as our invention is- 1. In a mercury test-gage, themercury-cup (4 having a screw-threaded upper part, in combination with atubular body screw-threaded for engagement therewith, means fordirectthe mercury-cup for the purpose of protecting the protruding partof the gagertube when the said cup has been removed, substantially asset forth.

In testimony whereof We affix on r signatures in presence of twowitnesses.

WILLIAM BOEKEL. JULIUS BOEKEL. Witnesses:

GEORGE W. SELTZER, ALLEN H. GANGEWER.

